1961973830 has 32 divisors (see below), whose sum is σ = 3812184000. Its totient is φ = 724780672.

The previous prime is 1961973821. The next prime is 1961973833. The reversal of 1961973830 is 383791691.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961973833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140405 + ... + 153744.

It is an arithmetic number, because the mean of its divisors is an integer number (119130750).

Almost surely, 2^1961973830 is an apocalyptic number.

1961973830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1961973830 is a deficient number, since it is larger than the sum of its proper divisors (1850210170).

1961973830 is a wasteful number, since it uses less digits than its factorization.

1961973830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294208.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 1961973830 is about 44294.1737703730. The cubic root of 1961973830 is about 1251.8849066728.

The spelling of 1961973830 in words is "one billion, nine hundred sixty-one million, nine hundred seventy-three thousand, eight hundred thirty".